package tela.enfermagem;

import ferramentas.Conexao;
import ferramentas.Query;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.text.ParseException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author ciar
 */
public class gerarCSV_Enfermagem extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException, SQLException, ParseException {
        response.setContentType("application/download");
        request.setCharacterEncoding("UTF-8");
        response.setCharacterEncoding("UTF-8");
        //PrintWriter out = response.getWriter();

        try {

            Query q = new Query();

            String caminhoArquivoCSV = System.getProperty("java.io.tmpdir")+System.getProperty("file.separator");

            ResultSet inscritos = null;

            String cursonivel = request.getParameter("nivel");
            inscritos = q.getInscritosEnfermagemPorNivel(cursonivel);

            GeradorCSV_Enfermagem geradorCVS = new GeradorCSV_Enfermagem();
            File arquivoCSV = geradorCVS.gerarListaCSV(inscritos, caminhoArquivoCSV);
            Conexao.close(inscritos.getStatement().getConnection(), inscritos.getStatement(), inscritos);


            int length = (int) arquivoCSV.length();
            ServletOutputStream op = response.getOutputStream();
            response.setContentLength((int) length);
            response.setHeader("Content-Disposition", "attachment; filename=\"" + geradorCVS.getNomeArquivoCSV() + "\"");
            byte[] bbuf = new byte[32767];
            DataInputStream in = new DataInputStream(new FileInputStream(arquivoCSV));

            while ((in != null) && ((length = in.read(bbuf)) != -1)) {
                op.write(bbuf, 0, length);
            }

            in.close();
            op.flush();

        } finally {
            //out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        try {
            processRequest(request, response);
        } catch (SQLException ex) {
            Logger.getLogger(gerarCSV_Enfermagem.class.getName()).log(Level.SEVERE, null, ex);
        } catch (ParseException ex) {
            Logger.getLogger(gerarCSV_Enfermagem.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        try {
            processRequest(request, response);
        } catch (SQLException ex) {
            Logger.getLogger(gerarCSV_Enfermagem.class.getName()).log(Level.SEVERE, null, ex);
        } catch (ParseException ex) {
            Logger.getLogger(gerarCSV_Enfermagem.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
